This Service Repair Manual covers the Mercury Outboard EFI models manufactured between 2002 and 2006. These four-stroke EFI engines are available in 40hp, 50hp, and 60hp configurations, featuring advanced Electronic Fuel Injection for optimal performance and efficiency. Engineered for reliability, these Mercury outboards are designed to provide dependable power for a wide range of marine applications, ensuring a robust and satisfying boating experience. This comprehensive manual provides detailed instructions for the repair, service, restoration, maintenance, rebuilding, and diagnosis of your Mercury Outboard. It includes essential information on tune-ups, preventative maintenance, and troubleshooting, along with specific repair procedures for engine components, fuel systems, electrical ignition, and lower units. With clear, step-by-step instructions, detailed pictures, diagrams, and exploded views, this manual is an indispensable resource for DIY enthusiasts, professional technicians, and workshops seeking to maintain and repair their Mercury Outboard EFI engines.